Stroh, David Peter, 1950-, author
Chelsea Green Publishing, 2015
Buku Teks
Zaltman, Gerald, author
Robert E. Krieger Publ., 1983
Buku Teks
Martin, Brian, author
Freedom Press, 1993
Buku Teks
Moore, Wilbert E. (Wilbert Ellis), author
Prentice-Hall, 1963
Buku Teks
edited by Robert A. Nisbet
Blackwell, 1972
Buku Teks